Thanks Curtis, but I have seen the whole system top and bottom. When Scott Stansty changed the clutch on the power brake system, we had to take out the front floorboard to get at it. Had to take the whole thing out and put it back together again. I keep the detector under the dash as a precaution, although there are no obvious leaks. The air intake is on the right side of the block, and the flexible tube runs along the exhaust pipe with an outlet on the right side of the front seat and the middle of the passenger compartment.